Autumn Equinox 2025. The autumnal equinox occurs in september each year, and in the northern hemisphere the date marks the end of summer and beginning of autumn. When is the 2025 autumn equinox?


Autumn Equinox 2025

The start of fall will be at 7: The 2025 fall equinox—also called the autumn equinox—takes place on sunday, september 22, 2025.

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